Background debug mode interface: Difference between revisions

Revision as of 21:52, 5 January 2008

Revision as of 03:04, 8 January 2008

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The '''Background Debug Mode interface''' (BDM) interface is an electronic interface that allows [[debugging]] of [[embedded system]]s. Specifically, it provides [[in-circuit emulator|in-circuit debugging]] functionality in microcontrollers. It requires a single wire and specialized electronics in the system being debugged.

It appears in many [[Freescale Semiconductor]] products.

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Examples include:

{| borderclass="1wikitable"

|+ BDM commands

|-

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== BDM Functions ==

Depending on the target part, the BDM controller may feature a hardware [[breakpoint]] register. The register holds a value indicating an [[memory address|address]] in memory. When the target part's CPU accesses that ___location in memory, the BDM hardware can take control of the target part, stop program execution, and begin operating in Background Mode.

== References ==

* Motorola (Freescale Semiconductor Inc.). CPU12 Reference Manual (CPU12RM/AD).

* Freescale Semiconductor Inc. MC9RS08KA2 Data Sheet (MC9RS08KA2, Rev. 1.0).

* Freescale Semiconductor Inc. RS08 Core Reference Manual (RS08RM, Rev. 1.0).

[[Category:Embedded systems]]

{{Uncategorized|date=January 2008}}